ARTINFO - Roy Lichtenstein’s "Half Face with Collar" (1963) (est. $15–20 million), carried a guarantee and failed to sell at last week's contemporary art evening sale.

Roy Lichtenstein’s "Half Face with Collar" (1963) (est. $15–20 million), carried a

guarantee and failed to sell at last week's contemporary art evening sale.

Courtesy Sotheby's